178 INSECTS, AND THEIR RELATION TO MAN 



DD. Fore wings half hard and half soft. Hemiptera ('half- 

 winged.) 



CC. One pair of wings Diptera (two-winged). 



AA. With four pairs of legs, no wings, and two body regions. Arachnida. 



(Spiders.) 



AAA. With many pairs of legs. No special body regions. No wings. 

 Myriapoda. (Centipedes, etc., Hundred-legged.) 



Questions 



1. Name the seven principal orders of insects, and give an 

 example of each. 



2. What are the characteristics of the lepidoptera ? 



3. How distinguish a fly from a bee ? 



4. What are the insecta ? 



5. How distinguish a spider from an insect ? 



6. How distinguish myriapods from spiders ? 



7. How do you get a logical definition of the class insecta? 



8. How tell a bug from a beetle ? 



9. When are caterpillars the most abundant ? 



10. At what stage does a moth do the most damage ? 



11. What constitutes a scientific name? 



Special Topics 



1. Classification of insects. 



2. Metamorphosis of insects. 



3. Economic importance of the locust. 



4. Comparison of activities of crayfish and grasshopper. 



References 



Hunter, Essentials of Biology . Chap. XIX. 



Elements of Biology. Chap. XIX. 



Needham, Elementary Lessons in Zoology. (Insecta.) 



Beutemuller, William, "Butterflies in the Vicinity of New York." 

 Guide Leaflet No. 7. American Museum of Natural History, 1902. 



Smith, John B., " Some of the Common Insects and how Children can 

 study Them." Journal of Proceedings and Addresses of Natural Educa- 

 tional Association, Asbury Park, N. J., 1905. 



